Work on this speech homework with a helper. The “S” Sound
This is a “Skinny Air” sound.
The back teeth should be nearly closed. Spread the lips in a smile position ( your lips should be stretched and skinny ). Raise the tongue-tip behind the teeth near the gum ridge. The breath stream travels over the grooved tongue. The air space is skinny.
This is a “Quiet brother” the vocal cords do not vibrate.
The “S” Sound